The tensile fatigue behaviour of a silica nanoparticle-modified glass fibre reinforced epoxy composite

Manjunatha, C. M.; Taylor, A. C.; Kinloch, A. J.; Sprenger, Stephan

doi:10.1016/j.compscitech.2009.10.012

Cited by 195 publications

(133 citation statements)

References 27 publications

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“…This enhanced fatigue life in the GFRP-hybrid composite was observed over the entire range of stress levels investigated. This is in agreement with previous work where fiber composites with modified matrices have been shown to exhibit higher constant amplitude fatigue lives when compared to their respective neat-matrix composites [2][3][4]12,42].…”

Section: Fatigue Life Predictionsupporting

confidence: 82%

Improved variable-amplitude fatigue behavior of a glass-fiber-reinforced hybrid-toughened epoxy composite

Manjunatha¹,

Jagannathan²,

Padmalatha³

et al. 2011

Journal of Reinforced Plastics and Composites

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A thermosetting epoxy polymer was hybrid-modified by the addition of 9 wt.% of rubber microparticles and 10 wt.% of silica nano-particles. Glass-fiber reinforced plastic (GFRP) composite laminates employing the unmodified epoxy matrix (GFRP-neat), and the hybrid epoxy matrix (GFRP-hybrid), were produced by a resin infusion technique. The experimental fatigue lives of both GFRP composites under three different variable amplitude load sequences, namely (i) a three-step increasing block, (ii) a three-step decreasing block and, (iii) a random block load sequence derived from a three-step load block, were determined. The fatigue life of the GFRPhybrid composite was higher than that of the GFRP-neat composite under all the three load sequence blocks investigated, by about x2.6 to x4.0 times. The saturated matrix crack density and the stiffness reduction rate were both lower in the GFRP-hybrid composite compared to the GFRP-neat composite material. The suppressed matrix cracking and reduced delamination growth rates measured in the hybrid-modified epoxy matrix enhanced the fatigue life of the corresponding GFRP-hybrid composite. Using the constant amplitude fatigue data generated at various stress ratios, the fatigue lives under these variable amplitude load sequence blocks were predicted using empirical models. The predicted fatigue lives, although non-conservative, were in reasonably agreement with the experimental results.

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Section: Fatigue Life Predictionsupporting

confidence: 82%

Improved variable-amplitude fatigue behavior of a glass-fiber-reinforced hybrid-toughened epoxy composite

Manjunatha¹,

Jagannathan²,

Padmalatha³

et al. 2011

Journal of Reinforced Plastics and Composites

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“…Blackman et al [17] also showed that silica nanoparticles could increase the cyclic-fatigue performance of epoxy polymers, in addition to increasing the fracture toughness. Furthermore, this improvement in cyclic-fatigue performance has been found to be carried through to an improved performance of fibre-composite materials based upon such modified polymeric matrices, as has been recently reported by Manjunatha et al [18].…”

Section: Introductionmentioning

confidence: 53%

The effect of carbon nanotubes on the fracture toughness and fatigue performance of a thermosetting epoxy polymer

et al. 2011

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Multi-walled carbon nanotubes, with a typical length of 140 lm and a diameter of 120 nm, have been used to modify an anhydride-cured epoxy polymer. The modulus, fracture energy and the fatigue performance of the modified polymers have been investigated. Microscopy showed that these long nanotubes were agglomerated, and that increasing the nanotube content increased the severity of the agglomeration. The addition of nanotubes increased the modulus of the epoxy, but the glass transition temperature was unaffected. The measured fracture energy was also increased, from 133 to 223 J/m 2 with the addition of 0.5 wt% of nanotubes. The addition of the carbon nanotubes also resulted in an increase in the fatigue performance. The threshold strain-energy release-rate, G th , increased from 24 J/m 2 for the unmodified material to 73 J/m 2 for the epoxy with 0.5 wt% of nanotubes. Electron microscopy of the fracture surfaces showed clear evidence of nanotube debonding and pull-out, plus void growth around the nanotubes, in both the fracture and fatigue tests. The modelling study showed that the modified Halpin-Tsai equation can fit very well with the measured values of the Young's modulus, when the orientation and agglomeration of the nanotubes are considered. The fracture energy of the nanotube-modified epoxies was predicted, by considering the contributions of the toughening mechanisms of nanotube debonding, nanotube pull-out and plastic void growth of the epoxy. This indicated that debonding and pull-out contribute to the toughening effect, but the contribution of void growth is not significant. There was excellent agreement between the predictions and the experimental results.

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“…Increasing the delamination resistance of these materials results in higher damage resistance and improved performance and lifetime. Hence, many methods of interlaminar toughening have been proposed and researched over the past decades [1][2][3][4][5][6][7][8][9][10][11][12]. The more recent principle of interleaving composite laminates with electrospun nanofibrous veils has shown to be a viable interlaminar toughening method [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Improved fatigue delamination behaviour of composite laminates with electrospun thermoplastic nanofibrous interleaves using the Central Cut-Ply method

Daelemans

Heijden

Baere

et al. 2017

Composites Part A: Applied Science and Manufacturing

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The tensile fatigue behaviour of a silica nanoparticle-modified glass fibre reinforced epoxy composite

Cited by 195 publications

References 27 publications

Improved variable-amplitude fatigue behavior of a glass-fiber-reinforced hybrid-toughened epoxy composite

Improved variable-amplitude fatigue behavior of a glass-fiber-reinforced hybrid-toughened epoxy composite

The effect of carbon nanotubes on the fracture toughness and fatigue performance of a thermosetting epoxy polymer

Improved fatigue delamination behaviour of composite laminates with electrospun thermoplastic nanofibrous interleaves using the Central Cut-Ply method

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